xrdp-proprietary/xrdp/funcs.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2004-2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * simple functions
 */

#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif

#include "xrdp.h"

/*****************************************************************************/
/* returns boolean */
int
rect_contains_pt(struct xrdp_rect *in, int x, int y)
{
    if (x < in->left)
    {
        return 0;
    }

    if (y < in->top)
    {
        return 0;
    }

    if (x >= in->right)
    {
        return 0;
    }

    if (y >= in->bottom)
    {
        return 0;
    }

    return 1;
}

/*****************************************************************************/
int
rect_intersect(struct xrdp_rect *in1, struct xrdp_rect *in2,
               struct xrdp_rect *out)
{
    int rv;
    struct xrdp_rect dumby;

    if (out == 0)
    {
        out = &dumby;
    }

    *out = *in1;

    if (in2->left > in1->left)
    {
        out->left = in2->left;
    }

    if (in2->top > in1->top)
    {
        out->top = in2->top;
    }

    if (in2->right < in1->right)
    {
        out->right = in2->right;
    }

    if (in2->bottom < in1->bottom)
    {
        out->bottom = in2->bottom;
    }

    rv = !ISRECTEMPTY(*out);

    if (!rv)
    {
        g_memset(out, 0, sizeof(struct xrdp_rect));
    }

    return rv;
}

/*****************************************************************************/
/* returns boolean */
int
rect_contained_by(struct xrdp_rect *in1, int left, int top,
                  int right, int bottom)
{
    if (left < in1->left || top < in1->top ||
            right > in1->right || bottom > in1->bottom)
    {
        return 0;
    }
    else
    {
        return 1;
    }
}

/*****************************************************************************/
/* adjust the bounds to fit in the bitmap */
/* return false if there is nothing to draw else return true */
int
check_bounds(struct xrdp_bitmap *b, int *x, int *y, int *cx, int *cy)
{
    if (*x >= b->width)
    {
        return 0;
    }

    if (*y >= b->height)
    {
        return 0;
    }

    if (*x < 0)
    {
        *cx += *x;
        *x = 0;
    }

    if (*y < 0)
    {
        *cy += *y;
        *y = 0;
    }

    if (*cx <= 0)
    {
        return 0;
    }

    if (*cy <= 0)
    {
        return 0;
    }

    if (*x + *cx > b->width)
    {
        *cx = b->width - *x;
    }

    if (*y + *cy > b->height)
    {
        *cy = b->height - *y;
    }

    return 1;
}

/*****************************************************************************/
/* add a ch at index position in text, index starts at 0 */
/* if index = -1 add it to the end */
int
add_char_at(char *text, int text_size, twchar ch, int index)
{
    int len;
    int i;
    twchar *wstr;

    len = g_mbstowcs(0, text, 0);
    wstr = (twchar *)g_malloc((len + 16) * sizeof(twchar), 0);
    g_mbstowcs(wstr, text, len + 1);

    if ((index >= len) || (index < 0))
    {
        wstr[len] = ch;
        wstr[len + 1] = 0;
        g_wcstombs(text, wstr, text_size);
        g_free(wstr);
        return 0;
    }

    for (i = (len - 1); i >= index; i--)
    {
        wstr[i + 1] = wstr[i];
    }

    wstr[i + 1] = ch;
    wstr[len + 1] = 0;
    g_wcstombs(text, wstr, text_size);
    g_free(wstr);
    return 0;
}

/*****************************************************************************/
/* remove a ch at index position in text, index starts at 0 */
/* if index = -1 remove it from the end */
int
remove_char_at(char *text, int text_size, int index)
{
    int len;
    int i;
    twchar *wstr;

    len = g_mbstowcs(0, text, 0);

    if (len <= 0)
    {
        return 0;
    }

    wstr = (twchar *)g_malloc((len + 16) * sizeof(twchar), 0);
    g_mbstowcs(wstr, text, len + 1);

    if ((index >= (len - 1)) || (index < 0))
    {
        wstr[len - 1] = 0;
        g_wcstombs(text, wstr, text_size);
        g_free(wstr);
        return 0;
    }

    for (i = index; i < (len - 1); i++)
    {
        wstr[i] = wstr[i + 1];
    }

    wstr[len - 1] = 0;
    g_wcstombs(text, wstr, text_size);
    g_free(wstr);
    return 0;
}

/*****************************************************************************/
int
set_string(char **in_str, const char *in)
{
    if (in_str == 0)
    {
        return 0;
    }

    g_free(*in_str);
    *in_str = g_strdup(in);
    return 0;
}

/*****************************************************************************/
int
wchar_repeat(twchar *dest, int dest_size_in_wchars, twchar ch, int repeat)
{
    int index;

    for (index = 0; index < repeat; index++)
    {
        if (index >= dest_size_in_wchars)
        {
            break;
        }

        dest[index] = ch;
    }

    return 0;
}